title: Spatial distribution of dynamics characteristic in the intermittent aeration static composting of sewage sludge.
abstract: Spatial differences and temporal changes in biological activity characteristics were investigated in a static reactor using intermittent aeration during the sewage sludge composting process. Pumice was proposed as a bulking agent in the composting of sewage sludge. Variations in temperature, moisture, oxygen level, volatile solids, specific oxygen uptake rate (SOUR) and dehydrogenase activity (DHA) were determined during 28 days of composting. The peak temperature in the upper region of the reactor was 10°C higher than that at the bottom. The moisture level in the middle region was significantly higher than that of other positions. Analysis of SOUR and DHA indicated that the lowest level of sludge stability was at the bottom region. These spatial and temporal differences in biochemical dynamics in the static system could extend the composting period and affect product uniformity.
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment (SKLUWER), Harbin Institute of Technology, Harbin 150090, PR China.
authors.forename: Ke
authors.initials: K
authors.lastname: Wang
authors.forename: Weiguang
authors.initials: W
authors.lastname: Li
authors.forename: Jianhua
authors.initials: J
authors.lastname: Guo
authors.forename: Jinlin
authors.initials: J
authors.lastname: Zou
authors.forename: Yunbei
authors.initials: Y
authors.lastname: Li
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
mesh_terms: D000332:Aerobiosis; D004602:Elements; D006813:Humidity; D010088:Oxidoreductases / Q000378:metabolism; D010100:Oxygen / Q000032:analysis; D012722:Sewage / Q000032:analysis*; D012987:Soil / Q000032:analysis*; D013696:Temperature; D014835:Volatilization
chemical_list: D004602:Elements; D012722:Sewage; D012987:Soil; D010088:Oxidoreductases; D010100:Oxygen